package com.mstanford.movie.controller;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class RequestFilter implements Filter {

	public void init(FilterConfig filterConfig) throws ServletException {}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {

		HttpServletRequest req = (HttpServletRequest)request;
		HttpServletResponse res = (HttpServletResponse)response;

		// 删除Cookie
		Cookie[] cookies = req.getCookies();
		
		for(Cookie cookie : cookies) {
			if("movieInfo".equals(cookie.getName())) {
				cookie.setMaxAge(0);
				res.addCookie(cookie);
				
				break;
			}
		}
		// 删除Seesion
		HttpSession session = req.getSession();
		session.invalidate();
		
		chain.doFilter(request, response);
	}
	
	public void destroy() {}
}